恩施新塘高坎子二次滑坡稳定性分析与工程防治方案优选  

Stability Analysis and Engineering Control Plan Optimization for Secondary Landslide of Gaokanzi in Enshi Xintang

作　　者：周海清 肖前 彭岳 李灿 邱琼 ZHOU Haiqing;XIAO Qian;PENG Yue;LI Can;QIU Qiong(Chongqing University of Science and Technology, Chongqing, 401331, China;China Construction Tunnel Corp LTD, Chongqing 401147, China;China Aerodynamics Research and Development Center, Sichuan Mianyang 621000, China)

机构地区：[1]重庆科技学院,重庆401331 [2]中建隧道建设有限公司,重庆401147 [3]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《沈阳大学学报（自然科学版）》2020年第2期147-152,共6页Journal of Shenyang University：Natural Science

基　　金：国家自然科学基金资助项目(41272356);重庆市基础研究与前沿探索项目(CSTC2018JCYJAX0373);中建股份科技研发项目(CSCEC-2017-Z-24).

摘　　要：由于强降雨作用恩施市新塘高坎子斜坡出现滑坡灾害,滑坡前部区段大部体积已经滑动,中后部区段后缘裂缝基本贯通.为了探明是否可能产生大型土体二次滑坡,通过传递系数法对中后部滑坡进行稳定性分析,并提出有效的防治措施.研究结果表明,滑坡在50年一遇暴雨工况下,中后部稳定性系数为0.991,不满足稳定性要求,有可能发生整体失稳,需要对其采取防治措施.根据滑坡体特征,提出抗滑桩与挡墙及截排水和削坡整平、抗滑桩与挡墙及截排水2套治理方案,综合考虑新塘滑坡防治工程的各种要素,推荐采用削坡整平、抗滑桩与挡墙及截排水方案.The slope of Xintang Gaokanzi in Enshi City has landslide disasters due to heavy rainfall.The landslide is divided into two parts:the front part and the middle-rear part.The large volume of the front part has been sliding,and the crack in the trailing edge of the middle-rear part is basically penetrated.In order to find out whether it is possible to produce secondary landslides in large soils,the stability analysis of the middle and rear landslides is carried out by the transfer coefficient method,and effective prevention measures are proposed.The result shows:in the case of landslides in 50 years,the stability coefficient of the middle-rear parts is 0.991,which does not meet the stability requirements.It is possible to cause overall instability,and it is necessary to take preventive measures.According to the characteristics of the landslide body,two sets of treatment schemes,anti-slide piles and retaining walls and interception and drainage schemes(scheme 1)and slope-leveling,anti-slide piles and retaining walls and interception and drainage schemes(scheme 2)are proposed.For the various elements of the landslide prevention project,it is recommended to adopt the second option.

关 键 词：滑坡 强降雨 稳定性分析 防治措施 方案比选 

分 类 号：P642[天文地球—工程地质学]